Improvement in heaters and ventilators



1. L. MAHAN. Heater and Ventilator.

WITNESSES i 0R o, 4. hra%% 11' I I p A I I ATTORNEYS,

MPETERs, PHOTO LIIHOGRAPHER vuwlmc ON a c UNITED STATES PATENT OEEIoE.

ISAAC L. MAHAN, OF BAYFIELD, WISCONSIN.

IMPROVEMENT lN HEATERS AND VENTILATORS.

Specification forming part of Letters Patent No. 206,339, dated July 23, 1878; application filed March 23, 1878.

To all whom it may concern.-

Be it known that I, ISAAC L. MAHAN, of Bayfield, in the county of Bayfield and State of WVisconsin have invented a new and valuable Improvement in Heaters and Ventilators; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing, making a part of this specification, and to the let- On one or both sides of the car is arranged a horizontal pipe, D, which is supported a suitable distance above the floor of the car by arms, standards, or other convenient means. This pipe D, is at any desired intervals, preferably under the car seats, provided with branches D, extending vertically downward and terminating in inverted funnels F, as shown. One end of the pipe connects with an upwardly-extending pipe, G, and the upper end of this latter pipe communicates, by an elbow, to, with the interior of the smoke-pipe 0.

It will readily be seen that the smoke'passing up through the smoke-pipe C will create a suction through the pipes G and D, which draws up the cold air from the bottom of the car through the inverted funnels F to the smoke-pipe and out at the top thereof.

The object of my invention is not to create or cause a circulation of air, but to carry off the cold air from the bottom of the car at various pointsnot only at one point, but at as many points as may be deemed necessary to rapidly effect thembject designed. As the cold air or the colder strata of air are thus removed the Warmer strata of air descend and take their place, thus soon equalizing the temperature and making the car comfortable.

In summer time, when, of course, no fire is made in the heater, I provide the smoke-pipe O with an exterior cylinder, H, of so much larger diameter than the smokepipe that a sufficient draft may be created from the top of said cylinder above the roof of the car to accomplish the same object by conducting a small pipe, I), from the vertical pipe G into the same, a stop-cock, a, in the pipe or elbow a being then closed. The pipe I) is also pro vided with a stop-cock, I), to be closed when the pipe at is used.

This invention is equally applicable to halls, large buildings, and other places where it is desired to equalize the temperature.

What I claim as new, and desire to secure by Letters Patent, is

l. The horizontal pipe D, provided with a series of vertical branches, D, terminating in inverted funnels F, and said pipe connected with the smokepipe of a heater, B, substantially as and for the purposes herein set forth.

2. The combination, With the smoke-pipe O, of a heater, B, the exterior cylinder H, forming communication with the horizontal pipe D, having series of branches D, with funnels F at their lower ends, for the purposes set forth.

3. The combination of a heater, 3, with smoke-pipe 0, having exterior cylinder H, the horizontal pipe D, having branches D, with fun nels F, and the vertical pipe G, with branches at b, having valves or stop-cocks a b, respectively, substantially as and for the purposes herein set forth.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

ISAAC L. MAHAN.

Witnesses:

O. H. McEWEN, J OHN F. BLAGKMAR. 

